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ECE :: Network Analysis and Synthesis

  1. If Va1 = Va2 = 100 V and Va0 = 0, then Va, Vb, Vc are

  2. A.
    200, -100 and -100 V
    B.
    100, 100, 300 V
    C.
    200, 100, 100 V
    D.
    100, -100, 100 V

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  3. Assertion (A): A series RLC circuit resonates when excited by variable frequency source.

    Reason (R): Resonant frequency is geometric mean of half power frequencies.

  4. A.
    Both A and R are true and R is correct explanation of A
    B.
    Both A and R are true and R is not the correct explanation of A
    C.
    A is true but R is false
    D.
    A is false but R is true

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  5. In figure, the switch S is initially open and steady state conditions are reached. At t = 0 switch is closed. The initial current through 2C capacitor is

  6. A.
    zero
    B.
    1 A
    C.
    2 A
    D.
    3 A

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  7. For an RC driving point impedance function, the poles and zeros

  8. A.
    should alternate on real axis
    B.
    should alternate only on negative real axis
    C.
    should alternate on imaginary axis
    D.
    none of the above

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  9. In the circuit of figure the current through 5 Ω resistance at t = ∞ is

  10. A.
    4 A
    B.
    2.5 A
    C.
    3.1 A
    D.
    0 A

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  11. In h parameter representation, the independent variables are

  12. A.
    I1 and V2
    B.
    I2 and V1
    C.
    V1 and V2
    D.
    I1 and I2

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  13. For maximum transfer of power, internal resistance of the source should be

  14. A.
    equal to load resistance
    B.
    less than the load resistance
    C.
    greater than the load resistance
    D.
    none of the above

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  15. Nichrome is used in

  16. A.
    heater coils
    B.
    underground cables
    C.
    overheated wires
    D.
    lamp filament

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  17. The Laplace transform of a continuous-time signal x(t) is If the Fourier transform of this signal exists, then x(t) is

  18. A.
    e2tu(t) - 2e-tu(t)
    B.
    - e2tu(- t) - 2e-tu(t)
    C.
    - e2tu(- t) + 2e-tu(t)
    D.
    e2tu(- t) - 2e-tu(t)

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